package com.tw;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import org.apache.catalina.connector.Request;

/**
 * Servlet Filter implementation class CharacterEncodingFilter
 */
public class CharacterEncodingFilter implements Filter {
	String CharacterEncoding;  //參數設定
	boolean enabled;    //參數設定

    /**
     * Default constructor. 
     */
    public CharacterEncodingFilter() {
        // TODO Auto-generated constructor stub
    }


	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here

		// pass the request along the filter chain
		if (enabled || CharacterEncoding != null) {
			request.setCharacterEncoding (CharacterEncoding);
			response.setCharacterEncoding (CharacterEncoding);
		}
		chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		CharacterEncoding = fConfig.getInitParameter("CharacterEncoding");
		enabled = "true".equalsIgnoreCase(fConfig.getInitParameter
				("enabled").trim());
	}

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}
}
